Colombian Rigoberto Uran won a drama-filled ninth stage of the Tour de France on Sunday as Australian Richie Porte and Briton Geraint Thomas crashed out with injuries. Champion Chris Froome retained the yellow jersey after finishing the stage third, behind Frenchman Warren Barguil who missed out on victory in a photo-finish after taking the polka-dot jersey and most aggressive rider awards.

Briton Froome's four bonus seconds on the line helped him increase his lead to 18sec over Italian Fabio Aru, who moved up a place to second with Thomas having quit the race. Bardet is now third at 51sec with Uran, who took the winner's 10sec bonus, fourth at 55sec.

Today was one of the hardest climbings stages of the 2017 Tour. See the others:

But other contenders including twice former runner-up Nairo Quintana of Colombia lost more than a minute, as did Dan Martin, who courageously battled on despite being taken down by Porte's spectacular crash, and even coming off his bike a second time on that same perilous descent.

Porte's crash was the most dramatic as he clipped the grass on the inside of a bend on the lightning quick descent down the fearsome Mont du Chat, less than 25km from the finish. He came off his bike and skidded across the tarmac into Martin, clattering both into the rock face on the other side of the road.

"Devastating images of @richie_porte coming from the road after a nasty crash. Richie will be taken to hospital for examination," said Porte's BMC team on Twitter.

Porte lay motionless on the road for some time being attended to by medics before being taken to hospital, although organisers said he was conscious and speaking. Thomas had crashed earlier on another descent, made treacherous by rain, and suffered a suspected broken collarbone.

It made for a bitter-sweet day for Froome who, despite increasing his lead and seeing several top rivals lose time, lost his chief Team Sky lieutenant Thomas and good friend Porte.

Twice former winner Alberto Contador was one of the big losers on the day from the 181.5km stage from Nantua to Chambery. The Spanish veteran cracked on the final of seven categorised climbs and lost several minutes by the finish.

Martin, though, produced a remarkable ride, limiting his losses despite his two crashes. "I managed to catch the group in front of me after I crashed the second time -- I was flying down the mountain," he said with a smile. "After I caught Nairo (Quintana) at the bottom, everyone was committed and it was just a case of getting to the finish."

Like Quintana, he came home 1min 15sec behind Uran and now sits sixth at 1:44, with Quintana remaining eighth but now out to 2:13 behind Froome.

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